I'm unable to connect to SQL Server 2005 from .NET. I'm getting the error " A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) ". The strange thing is, I'm able to connect through management studio using the same credentials (SQL Server authentication).
My connection string is: Server=servername;User ID=xxx;Password=xxx
I'm using the 2005 native client.
Also, I just realized Management Studio cannot connect if using named pipes, only TCP/IP.
What tells ADO.NET which protocol to use?
SQL Server 2005 may not be allowing inbound named pipes connections. This can be configured differently for the older SQL Server protocol and for the 2005+ Native Client. Check the SQL Server Configuration Manager on your database server.
(And yes, the Management Studio would still be able to connect to the remote database if named pipes were disallowed.)
Related
i have a windows server 2008 set up as a database server, i used to have MS SQL 2005 installed on it, due to some client changes i installed SQL 2008 R2 along with the 2005, the R2 is with a named instance. when i tried to connect an application to the 2008 R2 database, i get:
network-related or instance-specific error occurred while
establishing a connection to SQL Server. The server was not found or
was not accessible. Verify that the instance name is correct and that
SQL Server is configured to allow remote connections. (provider: TCP
Provider, error: 0 - A connection attempt failed because the connected
party did not properly respond after a period of time, or established
connection failed because connected host has failed to respond.)
i am sure of the ports as i checked the named instance configuration on the DB server, i also telnet the dynamic IP from the application server and it is going through. i also tried to connect a copy of the application from a demo server i have with the same configuration as the application server and it was successful. from the application server it is not, any suggestions?
Follow the steps in below link to get solution
[http://relyonsoft.com/techsupport/?p=1045][1]
I installed Sql Sever Management Express 2012 , but when i try to connect in Sql management studio environment , i have this error .
ADDITIONAL INFORMATION:
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft%20SQL%20Server&EvtSrc=MSSQLServer&EvtID=2&LinkId=20476
The system cannot find the file specified
BUTTONS:
OK
and in during installation i dont have option for select cluster !!
this is my SQL Server Configuration Manager , my sql server service is empty ...
And when get Remove a Failover Cluster Node , this error happened .
http://oi57.tinypic.com/2lrvat.jpg
when i enter SQLEXPRESS , i have error
Cannot connect to SQLEXPRESS. ------------------------------
ADDITIONAL INFORMATION: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible.
Verify that the instance name is correct and that SQL Server is configured to allow remote connections.
(provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 53)
Viewing your linked images, is clear that you haven't installed or installed unsuccesfully,
Sql Server Express 2012
In your Configuration Server Manager there is no instancse of SQL Server so it is normal not been able to connect.
Q: Sine there is no instance,when you Launch Management Studio what instance name do you select when you try to connect???
You should properly install SQL Server Express 2012
EDIT :
First Check if you have any version of SQL Server or SQL Server Express installed on your machine...(this can be done by looking through installed programs from control panel)
In order to Install and configure SQL Express 2008 follow this steps
Take in mind that you have to use SQL Management Studio 2008 later on (if you have 2008 server)
Hope it helps...
An error occured while establishing a connection to the
server. When connecting to the SQL
server 2005, the failure may be caused
by the fact that under the default
settings SQL server does not allow
remote connections. (provider: Named
pipes provider, error: 40 - Could not
open a connection to SQL server)
I am using .NET framework provider for SQL Server and Visual Studio 2008.
Data Source=.\SQLEXPRESS;AttachDbFilename="";Integrated Security=True;User Instance=True
What am I missing here?
I know external references are bad, but it really does not get better than this:
http://www.connectionstrings.com/
as they say
Server=.\SQLExpress;AttachDbFilename=c:\mydbfile.mdf;Database=dbname; Trusted_Connection=Yes;
AttachDbFilename should be the path to the database filed (generally a .mdf) that you will be using.
Data Source=.\SQLEXPRESS;AttachDbFilename=c:\some.mdf;Integrated Security=True;User Instance=True
An error occured while establishing a
connection to the server. When
connecting to the SQL server 2005, the
failure may be caused by the fact that
under the default settings SQL server
does not allow remote connections.
(provider: Named pipes provider,
error: 40 - Could not open a
connection to SQL server)
By default SQL Server Express disables remote connections via TCP/IP and Named Pipes, so you will need to enable these protocols in the SQL Server Configuration Manager (Start --> Programs --> Microsoft SQL Server 2008 --> Configuration Tools).
I also agree with Hogan about ConnectionStrings.com great site!
I am new to managing servers but I have just been given full access to set up an MS SQL Database on win server 2003. I have created a Database successfully and can connect locally (via remote desktop server)
Problem is I can't connect to the database from my personal computer (remotely, via ms sql server management studio). I have followed several tutorials such as: http://blog.sqlauthority.com/2009/05/21/sql-server-fix-error-provider-named-pipes-provider-error-40-could-not-open-a-connection-to-sql-server-microsoft-sql-server-error/
The error I am receiving is:
Cannot connect to 'servername'
ADDITIONAL INFORMATION:
A network-related or instance-specific
error occurred while establishing a
connection to SQL Server. The server
was not found or was not accessible.
Verify that the instance name is
correct and that SQL Server is
configured to allow remote
connections. (provider: Named Pipes
Provider, error: 40 - Could not open a
connection to SQL Server) (Microsoft
SQL Server, Error: 53)
Any help will be great, thanks!
"SQL Server is configured to allow remote connections"
You need to enable remote tcp/ip connections in sql surface area configuration. It's new in 2005 and then dropped in 2008.
If that doesn't work, you either have a network issue are are perhaps giving the wrong name - maybe you installed a named instance?
Is It Possible to connect SQL Server 2008 from SQL Server 2005 Enterprise Manager?
I am getting below mentioned error while connecting An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 1326)
Yes it's possible.
Have you used the SQL Server Configuration Manager to enable remote connections?
Under SQL Native Client 10.0 Configuration --> Client Protocols, you need to enable TCP/IP (I assume that's what you are using).